C*-simplicity and the amenable radical
Event details
| Date | 17.12.2015 |
| Hour | 13:00 › 14:00 |
| Speaker | Adrien Le Boudec (Université catholique de Louvain-la-Neuve) |
| Location | |
| Category | Conferences - Seminars |
Ergodic and Geometric Group Theory Seminar
We will first survey recent results of Kalentar-Kennedy and Breuillard-Kalentar-Kennedy-Ozawa about the connection between C*-simplicity of a discrete countable group and its boundary actions. We will then explain the construction of non-C*-simple groups with no amenable normal subgroup. These groups are defined in terms of an action on a tree, and some examples arising from this construction are moreover finitely generated and simple.
We will first survey recent results of Kalentar-Kennedy and Breuillard-Kalentar-Kennedy-Ozawa about the connection between C*-simplicity of a discrete countable group and its boundary actions. We will then explain the construction of non-C*-simple groups with no amenable normal subgroup. These groups are defined in terms of an action on a tree, and some examples arising from this construction are moreover finitely generated and simple.
Links
Practical information
- Informed public
- Free
Organizer
- Nicolas Monod
Contact
- Maxime Gheysens